Is there a way to circumvent positive lag condition on ddes?

Hello,

For dde23, I have a large vector of delays. In the dde function I can deal with it in double for loops. The problem is some of the elements in the delay vector are 0. But the dde23 throws the following error:

The lags must all be positive

Is there a way to circumvent this problem or do I have to write my own numerical integration function?

Thanks in advance,

Yasir

[Torsten]

Why don't you skip the delays if they are <= 0 ?